leonardo.com

Checked 22 October 2026, 09:35 UTC · via 8.8.8.8
✗Problems found
22 passed 3 warnings 1 failed 5 info

Registration

info

.com generic · Tucows Domains Inc. · expires 2027-11-03

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
Tucows Domains Inc.
Registered
4 November 1996
Last changed
11 August 2026
Expires
3 November 2027
Status
client transfer prohibited, client update prohibited
Registry nameservers
ns1.leonardo.com, ns2.leonardo.com, ns3.leonardo.com, ns4.leonardo.com
RDAP server
https://rdap.verisign.com/com/v1/

Checks

  • i
    .com is a generic TLD (gTLD)
    Generic TLD under an ICANN registry agreement: ICANN-accredited registrars, UDRP and RDAP apply.
    #1
  • ✓ TLD delegated and signed #2
    .com is delegated in the root zone and DNSSEC-signed.
  • ✓ Expires on 2027-11-03 #3
    The registration is valid until 2027-11-03 (376 days).
  • ✓ Transfer locked #4
    Registry status: client transfer prohibited, client update prohibited.
  • ✓ Registry and delegation match #5
    The nameservers registered at the registry are the ones published in DNS.

Delegation

warn

ns1.leonardo.com, ns2.leonardo.com, ns3.leonardo.com, ns4.leonardo.com

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
ns1.leonardo.com, ns2.leonardo.com, ns3.leonardo.com, ns4.leonardo.com
NS in the zone
ns1.leonardo.com, ns2.leonardo.com, ns3.leonardo.com, ns4.leonardo.com
NameserverAddressesNetwork (AS)Glue
ns1.leonardo.com185.51.13.92AS48135 ITMSC - ITMSC, IT185.51.13.92
ns2.leonardo.com185.51.13.93AS48135 ITMSC - ITMSC, IT185.51.13.93
ns3.leonardo.com185.51.12.92AS48135 ITMSC - ITMSC, IT185.51.12.92
ns4.leonardo.com185.51.12.93AS48135 ITMSC - ITMSC, IT185.51.12.93

Checks

  • ✓ 4 nameservers #6
    Delegated to ns1.leonardo.com, ns2.leonardo.com, ns3.leonardo.com, ns4.leonardo.com.
  • ✓ Parent and zone agree #7
    The parent delegation and the zone's NS records list the same nameservers.
  • ✓ Glue present and correct #8
    Glue is published for the nameservers inside the zone: ns1.leonardo.com, ns2.leonardo.com, ns3.leonardo.com, ns4.leonardo.com.
  • ✓ All names resolve #9
    Every nameserver name has an address and is not an alias.
  • ✓ Nameservers in different networks #10
    The nameservers are spread over 2 IPv4 /24s and 0 IPv6 /48s.
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS48135 (ITMSC - ITMSC, IT): 4 addresses). An outage or attack on that network affects all nameservers; large anycast providers mitigate this, but a secondary DNS provider adds independence.
    #11
  • i
    All nameserver names under .com
    All nameserver names are under one TLD, so a problem with that TLD also makes the nameservers unreachable. Some operators use names under two TLDs for extra resilience.
    #12
  • !
    No IPv6
    None of the nameservers has an IPv6 address, so IPv6-only resolvers can't reach them.
    #13

Nameservers

fail

4 of 4 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns1.leonardo.com 185.51.13.92NOERROR, 17 ms, authoritativenono / yesrefused-
ns2.leonardo.com 185.51.13.93NOERROR, 16 ms, authoritativenono / yesrefused-
ns3.leonardo.com 185.51.12.92NOERROR, 30 ms, authoritativenono / yesrefused-
ns4.leonardo.com 185.51.12.93NOERROR, 31 ms, authoritativenono / yesrefused-

Checks

  • ✓ All respond #14
    All 4 nameserver addresses answered.
  • ✓ All authoritative #15
    Every responding nameserver answers authoritatively for the zone.
  • ✓ No recursion #16
    The nameservers do not answer recursive queries for other domains.
  • ✓ No version disclosed #17
    The nameservers don't reveal their software version.
  • ✓ Zone transfers refused #18
    No nameserver allows a zone transfer to the public.
  • ✗
    No DNS over TCP
    DNS over TCP is required (RFC 7766); without it, large answers such as DNSSEC responses fail. Not answering over TCP: ns1.leonardo.com (185.51.13.92): dial tcp 185.51.13.92:53: i/o timeout; ns2.leonardo.com (185.51.13.93): dial tcp 185.51.13.93:53: i/o timeout; ns3.leonardo.com (185.51.12.92): dial tcp 185.51.12.92:53: i/o timeout; ns4.leonardo.com (185.51.12.93): dial tcp 185.51.12.93:53: i/o timeout.
    #19
  • ✓ EDNS supported #20
    All nameservers support EDNS(0).
  • ✓ Public addresses #21
    All nameserver addresses are publicly routable.

SOA

warn

serial 602 · primary ns1.leonardo.com

Found

Primary (MNAME)
ns1.leonardo.com
Contact (RNAME)
domain.leonardo.com
Serial
602
Refresh / retry
7200 s / 7200 s
Expire
2419200 s
Negative TTL
900 s

Serial per nameserver

NameserverSerial
ns1.leonardo.com (185.51.13.92)602
ns2.leonardo.com (185.51.13.93)602
ns3.leonardo.com (185.51.12.92)602
ns4.leonardo.com (185.51.12.93)602

Checks

  • ✓ Serial 602 everywhere #22
    All nameservers serve the same version of the zone.
  • !
    Unusual SOA timers
    retry 2h should be shorter than refresh 2h. Current values: refresh 2h, retry 2h, expire 28d, negative TTL 15m.
    #23
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns1.leonardo.com is one of the listed nameservers.
  • ✓ Contact domain@leonardo.com #25
    The SOA RNAME domain.leonardo.com means domain@leonardo.com.
  • ✓ Counter serial #26
    The serial 602 is a plain counter.

DNSSEC

warn

Not signed

Found

Validated by resolver
no

Checks

  • !
    Not signed
    The zone is not signed with DNSSEC, so answers can be spoofed. Enable DNSSEC at your DNS provider and publish the DS record at your registrar.
    #27

Records

info

15 records at the apex

Found

Read from
185.51.13.92:53
TypeValueTTL
SOAns1.leonardo.com. domain.leonardo.com. 602 7200 7200 2419200 9003600
NSns4.leonardo.com.3600
NSns3.leonardo.com.3600
NSns1.leonardo.com.3600
NSns2.leonardo.com.3600
A185.51.13.2163600
MX100 leonardo-com.mail.protection.outlook.com.3600
TXT"cisco-ci-domain-verification=302bec5e942177343f0255a168ac9073bfbfa975ac78182e9dd033eaa58ba41b"3600
TXT"google-site-verification=U10BdlRnlAQTz49-e05BEYUGvSmuoZeFvYDyq3XJwr4"3600
TXT"wiz-domain-verification=efabe11536846bdb4784c6584605568f40dbdb7a746f6cec523d3714973b2484"3600
TXT"actalis-dcv=tj49sesbcgg3qbq15j3c2o8l92"3600
TXT"v=spf1 include:leonardocompany.com -all"3600
TXT"mk-org-sso-35481ccb-9dc4-4d6c-928e-f0bfae53db6d"3600
TXT"vT9NY6DKtN/dnOVFOu2vI8HW0BbqkNniJ/ncFHHyml08z4Cbc7vP8o4QWr461oN0pJVjI6C/uvfhxStg8psNAA=="3600
TXT"MS=ms64198896"3600

Checks

  • ✓ TTLs within range #32
    TTLs: A 1h, MX 1h, NS 1h. The NS TTL at the parent is 2d and in the zone 1h; resolvers may use either.
  • ✓ No CNAME at the apex #33
    The zone apex has no CNAME record.
  • i
    Wildcard record
    A random name under the zone resolves, so there is a wildcard (*) record. Typos and non-existent hosts resolve too, which can confuse mail and certificate checks.
    #34
  • i
    No CAA records
    Without CAA records any certificate authority may issue certificates for this domain. A CAA record limits issuance to the CAs you use.
    #35